CN203509371U - Spot-welding electrode for aluminum alloy - Google Patents
Spot-welding electrode for aluminum alloy Download PDFInfo
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- CN203509371U CN203509371U CN201320510278.4U CN201320510278U CN203509371U CN 203509371 U CN203509371 U CN 203509371U CN 201320510278 U CN201320510278 U CN 201320510278U CN 203509371 U CN203509371 U CN 203509371U
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- aluminum alloy
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Abstract
The utility model discloses a spot-welding electrode for aluminum alloy and belongs to the technical field of spot welding. The spot-welding electrode for aluminum alloy comprises an electrode body, wherein the electrode body comprises an upper section, a middle section and a lower section, the upper section further comprises a protrusion, the middle section is cylindrical, the outer side of the lower section is cylindrical, a cylindrical inner cavity is formed in the inner side of the lower section, the bottom of the cylindrical inner cavity is an oblique plane, and the two ends of the oblique plane are connected with the bottom of the side face of the cylindrical inner cavity and the bottom of the outer side face of the lower section respectively. When the spot-welding electrode for aluminum alloy is used, once plastic deformation occurs in a local area of the end face of the electrode due to a small local explosion occurring in the area, nearby areas are also driven to be subjected to plastic deformation, the plastic-deformed area is enlarged quickly, a small local explosion caused by uneven point contact occurring again in next spot welding can be avoided, and welding quality is guaranteed; meanwhile, the cylindrical inner cavity improves the heat transmission path, and nugget skewing is effectively avoided.
Description
Technical field
The invention belongs to spot-welding technology field, specifically, relate to a kind of spot-wedling electrode, more particularly, relate to the spot-wedling electrode that a kind of aluminium alloy is used.
Background technology
The resistance spot welding of aluminium alloy is most important welding technique in body of a motor car automated production, but the subject matter existing in aluminium alloy resistance spot welding is exactly the too fast scaling loss of electrode, causes the frequent replacing of electrode.Affect production efficiency.By the research of aluminium alloy pinpoint welding electrode erosion failure mechanism is found, during spot welding, electrode contacts with inhomogeneous point between Al alloy parts contact-making surface and causes energising local little blast of moment and make electrode end surface regional area produce plastic deformation, the plastic deformation of this part has aggravated again conversely electrode and has contacted with the inhomogeneous point between workpiece contact-making surface, the little blast in part and the Cu-Al alloying reciprocation that by inhomogeneous some contact, are caused, accelerate electrode failure speed.Aluminum alloy welding is connected to a lot of Method and process, but well-known, the resistance spot welding of aluminium alloy is most important processing method in body of a motor car automated production, but, because aluminium alloy has extraordinary conduction, heat conductivility, its surface often has again the oxide-film of one deck densification, its melting temperature is the more than 3 times of aluminium alloy melting temperature, this has just brought great difficulty to the resistance spot welding of aluminum alloy materials, compare with ordinary carbon steel spot welding, aluminium alloy pinpoint welding not only needs to adopt larger welding current, and welding shunt influence is larger, electrode erosion is serious, electrode diameter changes greatly, spot welding for general mild steel, can reach several thousand points electrode life, and the spot welding of aluminium alloy generally only can reach tens points, welding quality is difficult to control, can not meet the requirement that serialization is produced far away, thereby had a strong impact on the application of aluminium alloy in auto industry, therefore, how to improve electrode life and welding quality, just the very corn of a subject and key have been become, the basic principle of aluminium alloy pinpoint welding electrode life-prolonging technique research, to alleviate exactly the Cu-Al alloying between electrode and Al alloy parts contact-making surface and reduce inhomogeneous point and contact the little blast in the part of causing, and this problem never has effective solution now, also someone attempts adopting the method that adds coating in electrode bottom, high cost not only, and effect is undesirable.
Summary of the invention
the problem that 1, will solve
For in prior art during spot welding electrode contact with inhomogeneous point between Al alloy parts contact-making surface and cause energising local little blast of moment and make electrode end surface regional area produce plastic deformation, the plastic deformation of this part has aggravated again conversely electrode and has contacted with the inhomogeneous point between workpiece contact-making surface, the little blast in part and the Cu-Al alloying reciprocation that by inhomogeneous some contact, are caused, the problem that electrode failure speed is accelerated, the invention provides the spot-wedling electrode that a kind of aluminium alloy is used.
2, technical scheme
In order to reach object of the present invention, the present invention adopts following technical scheme:
The spot-wedling electrode that aluminium alloy is used, comprises electrode body, and described electrode body comprises body epimere, body stage casing and body hypomere; On described body epimere, also comprise projection; Described body stage casing is cylinder; Described body hypomere outside is cylinder, and inner side has cylindrical cavity; The bottom of described cylindrical cavity is inclined-plane, and the two ends on inclined-plane are connected with the bottom of side and the bottom of body hypomere lateral surface of cylindrical cavity respectively.
Preferably, the side of described cylindrical cavity is parallel with body hypomere lateral surface; The angle of described inclined-plane and the side of cylindrical cavity is 45-60 °.
Preferably, the angle of the side of described inclined-plane and cylindrical cavity is 49 °.
3, beneficial effect
Than prior art, beneficial effect of the present invention is:
(1) electrode body of the present invention comprises body epimere, body stage casing and body hypomere, on body epimere, also comprise projection, body stage casing is cylinder, body hypomere outside is cylinder, inner side has cylindrical cavity, the bottom of cylindrical cavity is inclined-plane, the two ends on inclined-plane are connected with the bottom of side and the bottom of body hypomere lateral surface of cylindrical cavity respectively, projection can make electrode better fixing, avoid the dislocation of electrode when spot welding, the design of body hypomere makes the present invention guarantee that the contact-making surface of electrode and workpiece is less in the process of work, contact-making surface becomes annular, once there is local little blast and make electrode end surface regional area produce plastic deformation in a place, drive the near zone of changing the time that plastic deformation also occurs, expand rapidly plastic deformation region, can avoid this electrode on carrying out, once again to occur the little blast in part that inhomogeneous some contact causes during spot welding, guarantee welding quality, cylindrical cavity simultaneously, has improved the transfer route of heat, has effectively avoided nugget skew,
(2) angle of the side of inclined-plane of the present invention and cylindrical cavity is 45-60 °, within the scope of this, can guarantee that the expansion in plastic deformation region is moderate, is unlikely to again to cause the sharply shortening of electrode life;
(3) when the angle of the side of inclined-plane of the present invention and cylindrical cavity is 49 °, be preferred plan, now not only the situation of local little blast seldom occurs, and the life-span of electrode is the highest.
Accompanying drawing explanation
Fig. 1 is cutaway view of the present invention.
In figure: 1, body epimere; 2, projection; 3, body hypomere; 31, inclined-plane; 32, cylindrical cavity; 4, body stage casing.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is further described.
embodiment 1
As shown in Figure 1, the spot-wedling electrode that a kind of aluminium alloy is used, comprises electrode body, and described electrode body comprises body epimere 1, body stage casing 4 and body hypomere 3; On described body epimere 1, also comprise projection 2; Described body stage casing 4 is cylinder; Described body hypomere 3 outsides are cylinder, and inner side has cylindrical cavity 32; The bottom of described cylindrical cavity 32 is inclined-plane 31, and the two ends on inclined-plane 31 are connected with the bottom of side and the bottom of body hypomere 3 lateral surfaces of cylindrical cavity 32 respectively.The side of cylindrical cavity 32 is parallel with body hypomere 3 lateral surfaces; Described inclined-plane 31 is 49 ° with the angle of the side of cylindrical cavity 32.The diameter of body stage casing 4 and body hypomere 3 is all 6mm, and the diameter of cylindrical cavity 32 is 4.5mm, and material is copper.During work, body epimere 1 is stuck on mash welder, the spot welding life-span reaches 235 times, and welding quality is good, and nugget is without skew.
embodiment 2
With embodiment 1, difference is that inclined-plane 31 is 45 with the angle of the side of cylindrical cavity 32, and the spot welding life-span reaches 212 times, and welding quality is good, and nugget is without skew.
embodiment 3
With embodiment 1, difference is that inclined-plane 31 is 60 ° with the angle of the side of cylindrical cavity 32, and the spot welding life-span reaches 205 times, and welding quality is good, and nugget is without skew.
Claims (3)
1. the spot-wedling electrode that aluminium alloy is used, comprises electrode body, it is characterized in that: described electrode body comprises body epimere (1), body stage casing (4) and body hypomere (3); On described body epimere (1), also comprise projection (2); Described body stage casing (4) is cylinder; Described body hypomere (3) outside is cylinder, and inner side has cylindrical cavity (32); The bottom of described cylindrical cavity (32) is inclined-plane (31), and the two ends of inclined-plane (31) are connected with the bottom of side and the bottom of body hypomere (3) lateral surface of cylindrical cavity (32) respectively.
2. the spot-wedling electrode that a kind of aluminium alloy according to claim 1 is used, is characterized in that: the side of described cylindrical cavity (32) is parallel with body hypomere (3) lateral surface; Described inclined-plane (31) is 45-60 ° with the angle of the side of cylindrical cavity (32).
3. the spot-wedling electrode that a kind of aluminium alloy according to claim 1 and 2 is used, is characterized in that: described inclined-plane (31) are 49 ° with the angle of the side of cylindrical cavity (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320510278.4U CN203509371U (en) | 2013-08-21 | 2013-08-21 | Spot-welding electrode for aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320510278.4U CN203509371U (en) | 2013-08-21 | 2013-08-21 | Spot-welding electrode for aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203509371U true CN203509371U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320510278.4U Expired - Fee Related CN203509371U (en) | 2013-08-21 | 2013-08-21 | Spot-welding electrode for aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203509371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406682A (en) * | 2013-08-21 | 2013-11-27 | 芜湖奕辰模具科技有限公司 | Spot-welding electrode for aluminum alloy |
| CN104722909A (en) * | 2013-09-06 | 2015-06-24 | 通用汽车环球科技运作有限责任公司 | Apparatus and methods for repairing discrepant welds |
-
2013
- 2013-08-21 CN CN201320510278.4U patent/CN203509371U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406682A (en) * | 2013-08-21 | 2013-11-27 | 芜湖奕辰模具科技有限公司 | Spot-welding electrode for aluminum alloy |
| CN104722909A (en) * | 2013-09-06 | 2015-06-24 | 通用汽车环球科技运作有限责任公司 | Apparatus and methods for repairing discrepant welds |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20140821 |
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| EXPY | Termination of patent right or utility model |